Wide-field subcutaneous dilator

Abstract

The invention relates to a wide-field subcutaneous dilator, which comprises a bottom plate, an inner pipe and an outer pipe fixedly arranged on the bottom plate, a sliding groove arranged between the inner pipe and the outer pipe, a first fixing piece and a second fixing piece which are connected with the outer pipe integrally, an expansion pipe is arranged in the sliding groove and capable of sliding up and down, a first connecting plate and a second connecting plate are respectively arranged on two sides of the bottom of a expansion tube, a first distraction piece and a second distraction piece are respectively fixed on the first connecting plate and the second connecting plate; the top surface of the bottom plate is provided with an inserting groove used for clamping the expansion pipe, and the two sides of the bottom of the expansion pipe are connected with the first connecting plate and the second connecting plate in a slope type tangent structure respectively.

Description

technical field

[0001] The invention relates to a wide-view subcutaneous dilator, which is applied in the field of medical surgery. Background technique

[0002] As is known, when performing minimally invasive operations such as spinal paravertebral or thoracic posterior paravertebral minimally invasive channel system treatment, it is necessary to incise a hole in the human body and expand the soft tissue at the incision so that surgical devices such as an endoscope can be removed from the body. The incision hole extends into the affected area. At present, most minimally invasive operations use multi-stage expansion sleeves to expand the tissue step by step. However, expanding the incision hole step by step leads to a longer reaming time, which in turn prolongs the minimally invasive surgery. time; and the existing expansion sleeve usually adopts a circular tubular structure, but usually only need to cut a long strip opening for the patient, and the long strip cutting hole i...

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